/* ==========================================================================
   城市页 · 城市轮播（探索甘肃地市 上方）
   ========================================================================== */
.ch { padding: clamp(1.4rem, 3vw, 2.4rem) 0 clamp(.6rem, 1.6vw, 1.2rem); }
.ch__frame {
    position: relative; isolation: isolate;
    border-radius: 18px; overflow: hidden;
    background: #16211d;
    box-shadow: 0 26px 60px -46px rgba(16, 30, 26, .9);
    height: clamp(380px, 42vw, 540px);
}
.ch__slides { position: absolute; inset: 0; }
.ch__slide {
    position: absolute; inset: 0; margin: 0; opacity: 0;
    transition: opacity .85s ease;
}
.ch__slide.is-active { opacity: 1; }
.ch__slide img {
    width: 100%; height: 100%; object-fit: cover; object-position: center 42%;
    transform: scale(1.04); transition: transform 8s linear;
}
.ch__slide.is-active img { transform: scale(1); }
.ch__scrim {
    position: absolute; inset: 0; pointer-events: none;
    background:
        linear-gradient(90deg, rgba(12, 24, 20, .72) 0%, rgba(12, 24, 20, .42) 28%, rgba(12, 24, 20, .06) 58%, transparent 78%),
        linear-gradient(0deg, rgba(12, 24, 20, .18), transparent 35%);
}
.ch__copy {
    position: absolute; left: clamp(1.6rem, 5.6vw, 6rem); top: 50%; transform: translateY(-50%);
    width: min(30rem, 46%); color: #F7F3E9; z-index: 2;
}
.ch__eyebrow {
    display: inline-flex; align-items: center; gap: .55rem;
    font-size: .72rem; letter-spacing: .28em; text-transform: uppercase;
    color: #D8B474; margin-bottom: .85rem;
}
.ch__eyebrow::before { content: ""; width: 26px; height: 1px; background: #D8B474; }
.ch__name {
    font-family: "Noto Serif SC", "Songti SC", STSong, serif;
    font-size: clamp(2rem, 3.6vw, 3.1rem); line-height: 1.2; letter-spacing: .12em;
    margin: 0 0 .2rem; color: #FBF7EC; text-shadow: 0 2px 18px rgba(8, 18, 15, .55);
}
.ch__full { font-size: .7rem; letter-spacing: .36em; color: rgba(247, 243, 233, .7); margin-bottom: 1.25rem; }
.ch__desc {
    font-size: .92rem; line-height: 1.9; color: rgba(247, 243, 233, .86);
    margin: 0 0 1.4rem; max-width: 26rem; text-shadow: 0 1px 12px rgba(8, 18, 15, .5);
}
.ch__cta {
    display: inline-flex; align-items: center; gap: .5rem;
    background: #D6BD8D; color: #22332D; text-decoration: none;
    font-size: .86rem; letter-spacing: .08em; font-weight: 600;
    padding: .58rem 1.1rem; border-radius: 999px;
    transition: background .25s, transform .25s, box-shadow .25s;
}
.ch__cta:hover { background: #E6C88C; transform: translateY(-1px); box-shadow: 0 12px 24px -16px rgba(216, 180, 116, .9); }
.ch__cta svg { width: 1rem; height: 1rem; }

.ch__arrow {
    position: absolute; top: 50%; transform: translateY(-50%); z-index: 3;
    width: 42px; height: 42px; border-radius: 50%;
    display: grid; place-items: center; cursor: pointer;
    background: rgba(12, 24, 20, .18); border: 1px solid rgba(247, 243, 233, .5);
    color: #F7F3E9; backdrop-filter: blur(6px);
    transition: background .25s, border-color .25s;
}
.ch__arrow:hover { background: rgba(12, 24, 20, .72); border-color: #D8B474; }
.ch__arrow--prev { left: clamp(.7rem, 1.6vw, 1.3rem); }
.ch__arrow--next { right: clamp(.7rem, 1.6vw, 1.3rem); }
.ch__arrow svg { width: 1.05rem; height: 1.05rem; }

.ch__count {
    position: absolute; right: clamp(1.2rem, 3vw, 2.2rem); top: clamp(1rem, 2.4vw, 1.6rem); z-index: 3;
    font-size: .72rem; letter-spacing: .2em; color: rgba(247, 243, 233, .78);
    font-variant-numeric: tabular-nums;
}
.ch__count b { color: #D8B474; font-weight: 600; }

.ch__thumbs {
    position: relative; display: flex; gap: .65rem; padding: 1rem .2rem .4rem;
    margin: 0; width: 100%; box-sizing: border-box;
    overflow-x: auto; scrollbar-width: thin;
    scrollbar-color: rgba(25, 59, 56, .22) transparent;
}
.ch__thumbs::-webkit-scrollbar { display: none; }
.ch__thumb {
    flex: 0 0 72px; height: auto; border-radius: 7px;
    padding: 3px; border: 1px solid transparent; background: none; cursor: pointer;
    opacity: .75; transition: opacity .25s, border-color .25s;
}
.ch__thumb img { width: 100%; height: 44px; object-fit: cover; display: block; border-radius: 4px; }
.ch__thumb span { display: block; padding-top: .4rem; font-size: .7rem; color: #193B38; line-height: 1.6; white-space: nowrap; }
.ch__thumb:hover { opacity: .85; }
.ch__thumb.is-active { opacity: 1; border-color: #A98A53; background: rgba(216, 180, 116, .12); }
.ch__thumb:focus-visible, .ch__arrow:focus-visible, .ch__cta:focus-visible { outline: 2px solid #D8B474; outline-offset: 3px; }

@media (max-width: 900px) {
    .ch__frame { height: clamp(340px, 62vw, 440px); }
    .ch__copy { width: min(24rem, 68%); left: 1.4rem; }
    .ch__desc { font-size: .86rem; }
    .ch__arrow { width: 36px; height: 36px; }
}
@media (max-width: 640px) {
    .ch { padding-top: 1rem; }
    .ch__frame { height: 420px; border-radius: 14px; }
    .ch__copy { left: 1.1rem; right: 1.1rem; width: auto; top: auto; bottom: 2rem; transform: none; }
    .ch__scrim {
        background:
            linear-gradient(180deg, transparent 15%, rgba(12, 24, 20, .12) 36%, rgba(12, 24, 20, .65) 72%, rgba(12, 24, 20, .8) 100%);
    }
    .ch__eyebrow { color: #EBD39B; text-shadow: 0 1px 10px rgba(6, 14, 11, .75); }
    .ch__full { color: rgba(247, 243, 233, .72); }
    .ch__desc { color: rgba(250, 246, 236, .92); }
    .ch__name { font-size: 1.9rem; }
    .ch__desc { font-size: .82rem; line-height: 1.8; margin-bottom: 1rem; }
    .ch__thumbs { gap: .4rem; padding: .75rem .2rem .3rem; }
    .ch__thumb { flex-basis: 64px; }
    .ch__arrow { display: none; }
    .ch__count { top: .9rem; right: 1rem; }
}
@media (prefers-reduced-motion: reduce) {
    .ch__slide, .ch__slide img, .ch__cta, .ch__thumb { transition: none !important; }
    .ch__slide img { transform: none !important; }
}